Casio reveals new Pro Trek collab Bluetooth watch with mini leaf indicator

Casio has unveiled the Pro Trek x The Nature Conservation Society of Japan x Pickles the Frog collaboration watch in Japan. Also known by model number PRJ-B001NJ-3JR or PRJ-B001NJ-3, this watch has a green design, with nods to the popular frog character, who is the Nature Conservation Society’s mascot.

The Casio Pro Trek PRJ-B001NJ-3 is a hybrid watch with an earthy-toned dial and a dark green resin casing and strap. It has a black background digital display, a leaf motif on the indicator dial at 9 o’clock, and an image of Pickles can be found on the case back. Plus, this triple collaboration model comes with special packaging and a bottle opener badge.

Casio’s Pro Trek Hiker Line PRJ-B001 is a Bluetooth watch with features like automatic time correction and a phone finder tool available via the Casio Watches smartphone. The model supports 38 world time zones, with a Home City Swap function, and has a fully automatic calendar. On-watch tools include a timer, stopwatch, hourly time signals and multiple alarms. Plus, the double LED backlight and luminescent indexes and hands ensure you can read the watch face at any time of day. This is a low temperature resistant model, working in -10°C (~14°F) conditions, and is solar powered thanks to Tough Solar technology.

In Japan, the Casio Pro Trek x The Nature Conservation Society of Japan x Pickles the Frog collaboration watch (PRJ-B001NJ-3) will retail for ¥36,300 (~$235) at launch in March 2026. It is unclear whether or when this mid-range model could be released in other markets like the US, where the brand already sells older watches like the PRW-3510Y-8CR (curr. $385 at Amazon).